EP1239152B1 - Electric motor driven hydraulic pump - Google Patents
Electric motor driven hydraulic pump Download PDFInfo
- Publication number
- EP1239152B1 EP1239152B1 EP20020251514 EP02251514A EP1239152B1 EP 1239152 B1 EP1239152 B1 EP 1239152B1 EP 20020251514 EP20020251514 EP 20020251514 EP 02251514 A EP02251514 A EP 02251514A EP 1239152 B1 EP1239152 B1 EP 1239152B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- assembly
- frame
- sub
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0053—Venting means for starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0686—Mechanical details of the pump control unit
Definitions
- This invention relates to improvements in electric motor driven hydraulic pumps, for example of the type used in hydraulic suspension systems for vehicles.
- ECUs electronice control units
- pcbs printed circuit boards
- US-A-6091 174 describes a pump having a casing extended to form a casing for electronics.
- a lead-frame assembly may be implemented that retains and connects all the high power components, for example including a power-module of bare die FETs.
- the low power electronics may be mounted on a pcb board which is mounted on and connected to the lead-frame.
- the low power electronics may be mounted on a traditional FR4 pcb board which is mounted on and connected to the lead-frame.
- the lead-frame also includes a system connector moulded into it.
- the lead frame may also include mouldings adapted to guide the connectors of a stator assembly through the lead frame.
- the lead frame may also include mouldings adapted to guide the connectors of a stator assembly through the lead frame, for connection to the bare die FETs
- the lead frame may include integrally moulded portions for housing components of a three hall effect sensor.
- a support frame may be provided which together with a closure lid covers the electronics of the motor.
- Our invention has the advantage of achieving optimum space and conserving costs. It is not necessary, in this construction, to provide a separate housing for the electronics.
- a clamping means may be provided for releasably connecting the pump sub-assembly to the electronics sub-assembly.
- the clamping means may secure the support frame to a cup shaped housing of the pump sub-assembly.
- the pump/rotor sub-assembly may comprise a housing for a pump and a rotor assembly attached to the pump and sealed by a can within the pump housing.
- the pump sub-assembly may comprise a housing for a pump and a rotor assembly attached to the pump and sealed by a can within the pump housing.
- the support frame On assembly, the support frame may be introduced to the pump housing to place the stator around the rotor whereby the pump, the stator and the electronics are sealed by the pump housing, the support frame and the closure member.
- the motor with the pump and the motor drive and control electronics is integrated into a single case, preferably a single cast housing.
- the electric motor driven hydraulic pump illustrated in Figure 1-5 of the accompanying drawings comprises two sub-assemblies 1 and 2.
- a first of the two sub-assemblies is associated with a casting 3 of cup-shaped outline and the second with a support frame 4 which are clamped together at adjacent ends by a circumferentially extending clamping band 5.
- the casting 3 defines a housing for the rotor of an electric motor 6 and a pump impeller 7.
- the impeller 7 is driven by a drive shaft 8 driven by the rotor 9 of the motor and which is enclosed within a stainless steel can 10 which the stator 11 surrounds.
- the can is preferably manufactured from a non-magnetic material preferably stainless steel.
- the open end of the casting 3 is closed by the support frame 4 by the clamping action of the band 5 as described above.
- the support frame is of die cast construction and defines a mounting for a lead frame 12, the support frame 4 and the lead frame 12 include connecting paths from the motor to the electronics for controlling operation of motor 6.
- the lead frame provides a mounting for a circuit board 14 and also includes a connector 13.
- the lead frame 12 also includes a moulded bare die FET module indicated at 12' and integrally moulded portions 12" housing a hall effect sensor.
- the lead frame has additional mouldings 12"' each having an opening through which respective connectors 11' from the motor stator can pass to be joined with the FET leads.
- the lead frame and electronics are enclosed within an end cover 15.
- the sub-assembly 1 is built by inserting a further assembly comprising the pump impeller 7 and associated components, the shaft 8, the rotor 9, the pump housing 16 and the can 10. The further assembly being located within the housing 3 and then being secured with a circlip. The completed sub-assembly 1 then forms a stand alone sealed unit in which all the elements of the pump can be hydraulically tested prior to final assembly with the electronics.
- the sub-assembly 2 is assembled by mounting the board 14 carrying the electronics on the lead frame 12 and then locating the connector 13 of the lead frame through the opening 4' in the support frame 4. Once mounted in this position the bare die FET module is exposed on the side of the lead frame adjacent the support member 4 such as to abut the spigot 4" on the support member 4. A thermal compound may be applied between the abutting surfaces.
- stator connectors 11' are inserted through respective openings in the support frame 4 and the lead frame 12 to be joined with the FET leads in known manner.
- the support frame 4 is configured to support the stator 11 in its final position on sub-assembly 2.
- sub-assembly 2 The final part of sub-assembly 2 is to mount the cover 15 in place by way of a snap fit connection with the edge of the lead frame 12.
- the completed sub-assembly 2 then forms a stand alone unit in which the electronics and stator can be tested prior to final assembly with the pump assembly.
- stator 11 of assembly 2 is assembled such as to surround the can 10 of assembly 1.
- the assembly is completed by securing the clamping band 5 in position to clamp mating faces of the casting 3 and the lead frame 2 into engagement. In this final position, it is notable that the bare die FET module on the lead frame 12 is in contact with the support frame 4 as described above, which serves to help dissipate heat.
- each of the two sub-assemblies 1 and 2 can be manufactured separately, and tested individually.
- Each of the two sub-assemblies 1 and 2 can be manufactured at different locations and then both supplied to the customer for final assembly, for example on a vehicle during production.
- the two sub-assemblies can simply be assembled together and then clamped with mating faces in engagement as described above.
- stator could be part of sub-assembly 1 and the electronics alone would be a separate sub-assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
- This invention relates to improvements in electric motor driven hydraulic pumps, for example of the type used in hydraulic suspension systems for vehicles.
- Known electrical motor driven hydraulic pumps are controlled by electronic control units (ECUs) on printed circuit boards (pcbs) which are connected to the motor by some means. The space envelope of these is not optimised and the best cost cannot be achieved due to the need for providing a separate housing for the ECU or pcb.
-
US-A-6091 174 describes a pump having a casing extended to form a casing for electronics. - According to our invention we provide an electric motor driven pump as described in
independent claim 1. - Due to the limitation of space in the area of the chamber, a lead-frame assembly may be implemented that retains and connects all the high power components, for example including a power-module of bare die FETs.
- The low power electronics may be mounted on a pcb board which is mounted on and connected to the lead-frame.
- The low power electronics may be mounted on a traditional FR4 pcb board which is mounted on and connected to the lead-frame.
- Conveniently the lead-frame also includes a system connector moulded into it. The lead frame may also include mouldings adapted to guide the connectors of a stator assembly through the lead frame. The lead frame may also include mouldings adapted to guide the connectors of a stator assembly through the lead frame, for connection to the bare die FETs Conveniently the lead frame may include integrally moulded portions for housing components of a three hall effect sensor.
- A support frame may be provided which together with a closure lid covers the electronics of the motor.
- Our invention has the advantage of achieving optimum space and conserving costs. It is not necessary, in this construction, to provide a separate housing for the electronics.
- A clamping means may be provided for releasably connecting the pump sub-assembly to the electronics sub-assembly.
- The clamping means may secure the support frame to a cup shaped housing of the pump sub-assembly.
- The pump/rotor sub-assembly may comprise a housing for a pump and a rotor assembly attached to the pump and sealed by a can within the pump housing. The pump sub-assembly may comprise a housing for a pump and a rotor assembly attached to the pump and sealed by a can within the pump housing. On assembly, the support frame may be introduced to the pump housing to place the stator around the rotor whereby the pump, the stator and the electronics are sealed by the pump housing, the support frame and the closure member.
- With our invention the motor with the pump and the motor drive and control electronics is integrated into a single case, preferably a single cast housing.
- Two embodiments of our invention are illustrated in the accompanying drawings in which:-
-
Figure 1 is an end elevation of an electrical motor driven hydraulic pump; -
Figure 2 is a section on the line 2-2 offigure 1 ; -
Figure 3 is a perspective view of the pump with part of the casing removed for clarity; -
Figure 4 illustrates two sub-assemblies comprising the pump rotor assembly; -
Figure 5 is an exploded view of part ofFigure 4 ; -
Figure 6 is an exploded view of a second embodiment; and -
Figure 7 is a cut-away version of the pump illustrated inFigure 6 . - The electric motor driven hydraulic pump illustrated in
Figure 1-5 of the accompanying drawings comprises twosub-assemblies casting 3 of cup-shaped outline and the second with asupport frame 4 which are clamped together at adjacent ends by a circumferentially extendingclamping band 5. Thecasting 3 defines a housing for the rotor of anelectric motor 6 and apump impeller 7. As illustrated theimpeller 7 is driven by adrive shaft 8 driven by therotor 9 of the motor and which is enclosed within a stainless steel can 10 which thestator 11 surrounds. The can is preferably manufactured from a non-magnetic material preferably stainless steel. - The open end of the
casting 3 is closed by thesupport frame 4 by the clamping action of theband 5 as described above. The support frame is of die cast construction and defines a mounting for alead frame 12, thesupport frame 4 and thelead frame 12 include connecting paths from the motor to the electronics for controlling operation ofmotor 6. The lead frame provides a mounting for acircuit board 14 and also includes aconnector 13. Thelead frame 12 also includes a moulded bare die FET module indicated at 12' and integrally mouldedportions 12" housing a hall effect sensor. The lead frame hasadditional mouldings 12"' each having an opening through which respective connectors 11' from the motor stator can pass to be joined with the FET leads. The lead frame and electronics are enclosed within anend cover 15. - The
sub-assembly 1 is built by inserting a further assembly comprising thepump impeller 7 and associated components, theshaft 8, therotor 9, thepump housing 16 and thecan 10. The further assembly being located within thehousing 3 and then being secured with a circlip. The completedsub-assembly 1 then forms a stand alone sealed unit in which all the elements of the pump can be hydraulically tested prior to final assembly with the electronics. - The
sub-assembly 2 is assembled by mounting theboard 14 carrying the electronics on thelead frame 12 and then locating theconnector 13 of the lead frame through the opening 4' in thesupport frame 4. Once mounted in this position the bare die FET module is exposed on the side of the lead frame adjacent thesupport member 4 such as to abut thespigot 4" on thesupport member 4. A thermal compound may be applied between the abutting surfaces. - The stator connectors 11' are inserted through respective openings in the
support frame 4 and thelead frame 12 to be joined with the FET leads in known manner. Thesupport frame 4 is configured to support thestator 11 in its final position onsub-assembly 2. - The final part of
sub-assembly 2 is to mount thecover 15 in place by way of a snap fit connection with the edge of thelead frame 12. The completedsub-assembly 2 then forms a stand alone unit in which the electronics and stator can be tested prior to final assembly with the pump assembly. - As the
sub-assemblies stator 11 ofassembly 2 is assembled such as to surround thecan 10 ofassembly 1. Finally, the assembly is completed by securing theclamping band 5 in position to clamp mating faces of thecasting 3 and thelead frame 2 into engagement. In this final position, it is notable that the bare die FET module on thelead frame 12 is in contact with thesupport frame 4 as described above, which serves to help dissipate heat. - The construction described above has the advantage that each of the two
sub-assemblies sub-assemblies - In the modified construction illustrated in
Figures 6 and 7 the position of thecircuit board 14 and themounting lead frame 12 are the same as for the embodimentsFigure 1-5 , but aseparate FET module 17 is used. - It will be appreciated that whilst the
sub-assembly 1 can be fully tested for hydraulic integrity in order to test the rotor 9 a slave stator locked to a suitable power source may be employed. - In an alternative embodiment (not shown) the stator could be part of
sub-assembly 1 and the electronics alone would be a separate sub-assembly.
Claims (12)
- An electric motor driven hydraulic pump in which the casing of the motor is extended to include a chamber in which the electronics can be housed, the casing being constructed appropriately to be split in order to define a pump rotor sub-assembly (1) and an electronics sub-assembly (2) which can be tested separately and then joined together by use of simple interconnections, the electronics sub-assembly (2) comprises a support frame (4), a lead frame (12) carrying power components (12), a printed circuit board carrying electronic components (14), and a closure member characterised in that the electronic sub-assembly (2) includes the motor stator windings which are supported by the support frame and connected to the lead frame.
- A pump according to claim 1 in which the lead-frame assembly (12) retains and connects all the high power components.
- A pump according to claim 2 in which the high power components comprise a power-module of bare die FETs(12').
- A pump according to claim 2 or claim 3 in which the low power electronics are mounted on the pcb board which is mounted on and connected to the lead-frame (12).
- A pump according to any one of claims 2 to 4 in which the lead-frame (12) includes a single connector (13) moulded into it.
- A pump according to any one of claims 2 to 5 in which the lead-frame (12) includes mouldings adapted to guide the connectors (11') of a stator assembly (11) through the lead-frame (12).
- A pump according to any one of claims 2 to 6 in which the lead-frame (12) also includes integrally moulded portions for housing components of a three hall effect sensor.
- A pump according to any previous claim in which a support frame (4) is provided which, together with a closure lid, covers the electronics of the motor.
- A pump according to any preceding claim in which a clamping means (5) is provided for releasably connecting the pump sub-assembly (1) to the electronics sub-assembly (2).
- A pump according to claim 10 when dependant on claim 8 in which the clamping means (5) secures the support frame (4) to a cup-shaped housing (3) of the pump sub-assembly (1).
- A pump according to any one of claims 1 to 10 in which the pump sub-assembly (1) comprises a housing (3) for a pump, and a rotor assembly (9) attached to the pump and sealed by a can within the pump housing (3).
- A pump according to claim 10 or 11 in which the support frame is adapted to be, on assembly of the pump, introduced to the pump housing (1) to place the stator (11) around the rotor whereby the pump, the stator (11) and the electronics are sealed by the pump housing, the support frame (4) and the closure member.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0105641A GB0105641D0 (en) | 2001-03-08 | 2001-03-08 | Improvements in electric motor driven hydraulic pumps |
GB0105641 | 2001-03-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1239152A2 EP1239152A2 (en) | 2002-09-11 |
EP1239152A3 EP1239152A3 (en) | 2004-01-02 |
EP1239152B1 true EP1239152B1 (en) | 2010-08-18 |
Family
ID=9910171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020251514 Expired - Lifetime EP1239152B1 (en) | 2001-03-08 | 2002-03-05 | Electric motor driven hydraulic pump |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1239152B1 (en) |
DE (1) | DE60237326D1 (en) |
GB (1) | GB0105641D0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500575B1 (en) | 2011-03-12 | 2016-07-13 | Grundfos Management a/s | Heat circulation pump |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2418072B (en) * | 2004-09-14 | 2008-05-07 | Dana Automotive Ltd | Pump assembly |
DE102005039557A1 (en) * | 2005-08-22 | 2007-03-01 | Robert Bosch Gmbh | rotary pump |
DE102007042186A1 (en) * | 2007-08-28 | 2009-03-05 | Deutsche Vortex Gmbh & Co. Kg | Control for switching on and off a circulation pump of a hot water supply |
EP2750266B1 (en) * | 2012-12-27 | 2021-10-20 | Grundfos Holding A/S | Pump power unit |
CN111271295A (en) * | 2020-04-01 | 2020-06-12 | 广东骏驰科技股份有限公司 | Electric water pump with control panel arranged in middle of water pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5096390A (en) * | 1990-10-16 | 1992-03-17 | Micropump Corporation | Pump assembly with integral electronically commutated drive system |
US5670852A (en) * | 1994-01-18 | 1997-09-23 | Micropump, Inc. | Pump motor and motor control |
DE4411960C2 (en) * | 1994-04-07 | 2001-07-12 | Pierburg Ag | Liquid pump driven by an electronically commutated electric motor |
DE19624145A1 (en) * | 1996-06-18 | 1998-01-08 | Wilo Gmbh | Electric motor |
US6065946A (en) * | 1997-07-03 | 2000-05-23 | Servo Magnetics, Inc. | Integrated controller pump |
-
2001
- 2001-03-08 GB GB0105641A patent/GB0105641D0/en not_active Ceased
-
2002
- 2002-03-05 EP EP20020251514 patent/EP1239152B1/en not_active Expired - Lifetime
- 2002-03-05 DE DE60237326T patent/DE60237326D1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2500575B1 (en) | 2011-03-12 | 2016-07-13 | Grundfos Management a/s | Heat circulation pump |
Also Published As
Publication number | Publication date |
---|---|
EP1239152A3 (en) | 2004-01-02 |
GB0105641D0 (en) | 2001-04-25 |
EP1239152A2 (en) | 2002-09-11 |
DE60237326D1 (en) | 2010-09-30 |
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